Door-lock.



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DOOR LOCK. -APPLIGATION FILLED SEPT. 21. 1904.

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, APPLIOATION FILED SBPTJl, 1904.

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DOOR-LOCK.

Specification of Letters Patent.

Patented sept. 2e, 1905.

lApplication filed September 21, 1904. Serial No. 225,302.

To all whom, t mja/ zj con/cern;

Be it known thatLJOHN TOTH, a citizen of the United States, residing at Steinway, Long Island City, in the county of Queens and State of New York, have invented certain new and' useful Improvements in Door-Locks, of which the following is a specification, such as will enable those skilled in the art to which it apy pertains tomake and use the same.

This invention relates to locks for doors; and the object thereof is to provide an improved device of this class involving an ordinary latch-bolt and two-lock-bolts adapted to be operated by a single key, the construction of the lock being such that -the lock-bolts cannot be operated even by one having the proper key unless he be familial' with the'construction and operation of the lock.

The invention is fully disclosed in the following specication, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- Figure l is a front view of the lock with the front of the casing removed and showing part of the construction broken away and showing also the key inserted; Fig. 2, a similar view showing the parts in a different position; Fig. Y

3, a similar view showing the parts in another position; Fig. 4, a section on the linea Llof Fig. 1, and Fig. 5 a section on the line 5 5 of Fig. 2. y

In the practiceof my invention I provide a lock-case a, which isvrectangular in form and provided with a face-plate a2, which is designed in practice to be countersunk in and secured to the face of the door, and at a3 Iv have shown a similar plate designed to be countersunk in and secured to the door-frame adjacent to the lock.

In the top portion lof the lock-case a 'is aI latch-bolt b, provided with the lusual beveled head b2 and which is normally held in a hori-A zontal position, as shown in Fig. 1, and the knob-spindle b3 passes through the case a 4below the inner end of the bolt b and is provided with a hub b4, the side of which adjacent to the face-plate a of the case is provided with an upwardly-directed linger b5 anda downwardly-directed finger b, and pivoted below and slightly to the right of the spindle b3, asshown at 67, is an upwardly directed dog c, the upper end of which is provided with a forwardly-directed nose c2, in connection with which the finger b5 operates, and the inner end of the bolt is piv- I.

oted to the dog c at 03 and secured tothe case cr at the right of the dog c, and below the spindle b3, as shown at of, is a spring c5, which operates on the pivot-pin at c3 and normally forces the bolt b into operative position, as shown in Fig. l, and the bolt or the head 52 thereof may be withdrawn by'turning the knob-spindle 3 in either direction. When the knobspindle b3 is turned in one direction, the finger b5 of the hub Z strikes the nose c2 of the dog c and forces the upper end of said dog backwardly, and this withdraws the bolt and the head Z22 thereof, and when the knob-spindle b3 is turned in the other direction the linger of the hub b4 presses on a forwardly-directed projection c of the dog c, and this also forces `the upper end'of said dog backwardly and withdraws the latch-bolt thereof.

In the bottom portion of the case a and parallel with the latch-bolt b are two lock-bolts 0l and e, provided, respectively, with heads Z2 andez, which are adapted to be projected and the head b2 through the face-plate a2, and said bolts d and e are provided, respectively, with a transverse shoulder d3 and c3, and springs d* and e4 are secured in the case a, a's shown at w, and bear on said shoulders, so as to normally project the bolts 0l and e or the heads Z2 and e2 thereof. The bolts Z2 and Ae2 are thinner than the heads thereof, and said bolts are. provided centrally thereof with longitudinal slots (Z5 and e5, respectively, and the adjacent edges of said bolts arecut out longitudinally, as shown at Z6 and e, so that the said bolts are narrower in vertical section than the heads v d2 and e2 thereof.

' The upper edge of the bolt 0l is provided with two notches or recesses @Z7 and als and 95V the lower edge of the bolt e with similar notches or recesses e7 and es, and said bolts are provided at their inner ends with a longitudinal slot d and e, respectively, and secured to back of the case a are pins x2, which project through the slots d and e and form guides for the rear ends of said bolts. j

Placed on the'bolt al is a plate f; the upper edge of'which is provided with an arm f2, which projects in the direction of the plate a2 and is pivoted in the case a adjacent to roo los

said plate, as shown at f3, and the arm f2 and the plate f adjacent thereto is provided with. a backwardly-directed flange f4, adapted to.

.rest'on the top edge of theV bolt d and at the.

f, so that in the right-hand end of which is a downwardlydirected tooth f5, adapted to engage the notches or recesses d? and ril in said bolt, and secured in the case ft above the arm f2 is a spring f, which bears on the inner end otl the tlangef* and normally forces the plate f down-wardly into the position shown in Fig. l, and in Figs. 2 and 3 the plate f is broken away, so as to show the iiange f" and the operative parts in connection therewith.

Placed on the bolt Z and between said bolt and the plate f is a dog g, which is pivoted in position by means of a pin g2, passing through the slot ci and secured to the case a, and the upper end or head of the dog g is oblong and rectangular in form and provided with a longitudinal groove or recess g3, and said dog g is provided with a nose g", which projects downwardly to the right.

Pivoted to the inner lower corner ot' the bolt d. as shown at g", is a dog t, which eX- tends in the direction of the tace-plate a2 and the end of which is Aprovided with a downwardly-directed nose if, an upwardly-directed nose and a forwardlydirected nose L". The upper side of the dog /t is cut out to term a recess la, and placed between the bolt (Z and the plate fis a spring t', having two arms, one of which passes through the slot g3 in the head of the dog g and bears on the fiangef4 of the plate f, and the other arm of which is iirmly held in the nose LS of the dog L, and said spring' is provided with a coil 2, which rests in the recess it in the top ot' said dog, and the spring if is weaker than the spring normal position ot' these parts the plate f will be held in the position shown in Fig. l.

A plate j is placed on the bolt @and is similar in all respects to the plate f, except that the upper edges thereofl are cut out to form a recess 033. The plate j is provided with an arm j'z, pivoted at f3, and said arm and plate are provided with a backwardly directed iiange f4, which bears on the bottom ot the bolt e, and the inner end of which is provided with an upwardly-directed tooth j, which is adapted to enter the notches or recesses c and e8 in the bottom edge of the bolt e, and a springj is placed below and bears on the backwardly-directed flange j* otl the plate j' and normally holds said plate in the position shown in dotted lines in Figs. l and 2 and shown partially in dotted and partially in full lines in Fig. l. A dog le, similar to the dog g, is placed between the bolt c and the plate j and is pivoted on a pin 7a2, passing through the slot e5 in the bolt e, and is provided at its lower end with an oblong rectangular head /63 and at its upper end with a nose 76k, which projects upwardly and to the right. 1t will be observed that the dog It is similar to the dog r, but the position thereof is reversed, and pivoted to the inner end and upper corner or' the bolt e, as shown at t'F, is a dog m,

l which projects to the lett and the end ol which l is provided with an upwardly-directed nosev mi, a downwardly-directed nose m, and a lorwardly-directed nose m", and the bottom portion of said dog is cut out to iorm a recess/11"'. Placed between the bolt l and the plate j is a l spring 1i, formed into a coil n2, which lits in the recess m" in the dog m, and one arm oi' said spring projects toward the lace-plate fi and passes through a groove or recess in the head f of the dog and the other arm thereet' is short and secured in the nose m ol the dog m.

1t will be observed that the dog m, the spring/2z., the dog r, and the springf, together with the plate j, are similar to the corresponding parts t, y, f, and j", hercinbei'ore described and operating in connection with the boltd; but the position oi the parts which operate in connection with the bolt i are reversed.

lu the operation ot the latch-bolt when the knob-spindle if is turned in either direction the corresponding tinger or l1 operates to torce the head 02 ot the latch-bolt ontol en gagement with the plate (/3 ol the door-frame, and upon the releasing of the spindle /f the spring c5 forces said head /f outwardly into engagement with said plate u. In operating the lock-bolts, reference being made to Fig. l of the drawings, in which the bolts r/ and f are drawn backward ly out ol engagement with the plate a, it will be seen that when the key o is revolved from its initial entrance position in either direction said key or the lug thereet will engage the noses m2 or oli the dogs m or J, according to the direction in which said key is turned, and it' the key strikes the nose m2 the dogm is depressed and the spring n. connected thereto and normally bearing upon the tooth ot' the plate j said tooth will be forced out ot the recess el, and the, bolt e being thereby released is lorced outwardly into the position shown in Fig. Q by means of the spring e", and the door is locked thereby by means otl the head e ot' said bolt. Upon continuing the rotation ol the key o the lug thereof strikes the nose y ot' the dog ,r/ or in the other direction the nose /lfi oi the dog t, and the same result follows as described with reference to the bolt f, and the bolt Z is shot outwardly by means oli the spring (Z4, and the door is locked by both of the bolts Z and c at this time, and ii the key strikes the noses g and 1" ot' the dogs f/ and 1, respectively, said dogs being mounted upon iixed pivots, the corners oi the heads ol the dogs g and 7e adjacent to the iiange j ot the plate j' or the iiangefl oi the plate j" will force said corresponding liange and plate, outwardly, as clearly shown in dotted lines in Fig. l and full lines in Fig. 3, and it will therefore be seen that after the key is inl serted into the lock and slightly rotated in leither direction the bolt c is released and IIO lto

forced outwardly and upon continued rota-v tion of the key the bolt 0l is released" and forced outwardly and the door is locked.

In Fig. 3 of the drawings both the bolts are shown in their outward position and the key o'is shown after having described an arc of ninety degrees, at which time it has come in contact with the nose 7a4 of the dog 7c and forced the plate joutwardly, thusreleasing the tooth f5 thereof from the recess es, in Whichat this time it normally rests, and upon a slightlygreater arc being described by the key the said nose 7c* of the dog 7o is released and the tooth f5 again enters the recess es because of the spring j and the bolt e. has not been forced backwardly, and if the key 0 is still further revolved lthe lug thereof strikes the nose g4 of the dog g and forces ysaid dog into the position shown in Fig. 3, and the nose g4 thereof coming in contact with the nose 71,2

of the dog /L said dog is `forced upwardly, and

although at this time the tooth fr of the flange fi of the plate f is disengaged from the recess d8, in which it rests, the key o, having no projection upon thebolt d or dogs g or z to engage with, said key continues its rotation until the said dogs are released and forced into their normal position by .means of the spring v1, and' the plate f resuming its normal position the tooth f5 of the plate f again enters the recess d8 and the door remains locked, and if from the position shown in dotted lines at 0 in Fig. 3 the key is turned to the left it strikes thenose 7a4 of the dog f, which in turn. strikes the nose m2 of the dog m and the result described with reference to the dogs g and z follows, said dog m being depressed, and the tooth y'5 of the plate j is released from the recess es oflthe bolt e and the key striking no projection with which it can engage continues its rotation beyond the dogs la and m, which resume their normal positions because of the springe when said key has passed and the bolt e has not thereforebeen withdrawn and the door remains locked. l v

1t will therefore be seen from the foregoing description that a person not knowing the operation of my lock will be unable to withdraw either of thek bolts d or e and cannot `therefore unlock the door; but if it is desired to withdraw'the bolts d and @the key 0 is rotated in the direction of the arrow y2 in Fig. 2 through an arc slightly greater than one hundred and eighty degrees or until it passes the nose h2 of the dog t and the dog has resumed its normal position., and if at this time the key 0 be revolved in the direction lopposite the arrow y2 the lug of the key 0 is into contact with the plate f in its rotation.

the door is therefore unlocked as regards the bolt d.

If the key o is rotated in the direction opi posite the arrow g2 until it passes the nose m2 of the dog m in the position shown in Fig. 2, the lug of said key has depressed the plate y' by coming incontact therewith, and the tooth f5 thereof is therefore out of engagement with the recess e8, and if the key is at this time revolved in the direction of the arrow y2 the lug of said key bearing against the nose m2 of the dog m forces the bolt a; backwardly until the lug of said key releases the plate j, which 4is then forced into its normal position byv means of the spring f6, and when the bolt e has been so forced to its eXtreme backward position the tooth ji of the. plate j enters the recess e7, and the bolt e is therefore withdrawn 4and the head e2 thereof isout ofengagernent with the plate a3 and the door is unlocked.

lt will be understood, of course, that the key is rotated no farther than is necessary to m, for still farther rotated it would pass the noses g4 or 704 of the dogs g or 71;, respec- 'pass the nose 7b2 of the dog t or m2 of the dog loo tively, and continued rotation would repeat the operationv described and shown with reference to the dogs g and t in Fig. 3, and the door would not be unlocked, and very little practice is necessary to accustom a person as to the degree-of rotation of the key 0 in either direction to withdraw the bolt Z or e; but without the knowledge necessary as to the degrec of rotation said door cannot be opened.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, isi 1. A lock, comprising a casing provided with two lock-bolts one of which is placed above the other, springsy for projecting said bolts, a plate pivotedl in said casing so as to I 1Mo swing in a plane parallel with and adjacent v' to the upper bolt, said plate being adapted to engage said bolt and hold it in a withdrawn y.

position, a spring for depressing said plate, a dog pivoted between said plate and said bolt by a pin passing through a slot `in said bolt,

lanother dogxpivoted to the inner end of said bolt, a spring in operative connection with the last-named dog and adapted to raise said plate, a plate pivoted adjacentto the bottom bolt and adapted to swing in a vertical plane 'parallel with and adjacent thereto and to engage saidA bolt and hold it in a .withdrawn position, a'spring for raising said plate, a dog `a plate pivoted so as to swing,` in a vertical plane parallel with and adjacent to the top bolt, said plate being adapted to engage said bolt and hold it in a withdrawn position, means for holding said plate in a depressed position, a dogl pivoted between said plate and said bolt, another dog` pivoted to the inner end of said bolt, means for depressing the last-named dog` and raising` said plate, a plate pivoted adjacent to the bottom bolt and adapted to swine' in a vertical plane parallel therewith and :nljacent thereto and adapted to hold said bolt in a withdrawn position, means for raising,- said plate, a dog pivoted between said plate and said boli, another dog' pivoted to the inner end olf said bolt, means connected with the last-inlined doe' for raisingsaid plate, and means whereby said dogs may bcoperatcd by a single key and either or both ol said bolts projected, substantially as shown and described.

Vln testimony that l claim the foregoing' as my invention l have signed in v naine, in presence of the snbseribing` witnesses` this 10th day of September, 190i.

Yitnessesz l?. A. S'rmmn'r, C. J. KLEIN. 

